CVE-2026-3632 LOW

CVE-2026-3632: Libsoup: libsoup: http smuggling and server-side request forgery via malformed hostnames

Vendor Red Hat
Product Red Hat Enterprise Linux 10
Weakness CWE-1286
Published March 17, 2026
Last update March 19, 2026

CVSS base score

3.9/10
Attack vector Network
Attack complexity High
Privileges required High
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/A:L

What the vulnerability does

01Description

A flaw was found in libsoup, a library used by applications to send network requests. This vulnerability occurs because libsoup does not properly validate hostnames, allowing special characters to be injected into HTTP headers. A remote attacker could exploit this to perform HTTP smuggling, where they can send hidden, malicious requests alongside legitimate ones. In certain situations, this could lead to Server-Side Request Forgery (SSRF), enabling an attacker to force the server to make unauthorized requests to other internal or external systems. The impact is low, as SoupServer is not actually used in internet infrastructure.

Key dates

02Disclosure timeline

March 17, 2026 CVE published
March 19, 2026 Record updated